Ruiz de Elvira Carrascal, Jacobo; Hoferichter, Martin; Kubis, Bastian; Meißner, Ulf-G (2018). Extracting the σ-term from low-energy pion-nucleon scattering. Journal of Physics G: Nuclear and Particle Physics, 45(2), 024001. Institute of Physics Publishing IOP 10.1088/1361-6471/aa9422
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We present an extraction of the pion-nucleon (πN) scattering lengths from low-energy πN scattering, by fitting a representation based on Roy–Steiner equations to the low-energy data base. We show that the resulting values confirm the scattering-length determination from pionic atoms, and discuss the stability of the fit results regarding electromagnetic corrections and experimental normalization uncertainties in detail. Our results provide further evidence for a large πN σ-term, σπN = 58(5) MeV, in agreement with, albeit less precise than, the determination from pionic atoms.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Ruiz de Elvira Carrascal, Jacobo |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0954-3899 |
Publisher: |
Institute of Physics Publishing IOP |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
02 Mar 2018 12:50 |
Last Modified: |
05 Dec 2022 15:09 |
Publisher DOI: |
10.1088/1361-6471/aa9422 |
ArXiv ID: |
1706.01465 |
BORIS DOI: |
10.7892/boris.109956 |
URI: |
https://boris.unibe.ch/id/eprint/109956 |
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